﻿using Reference.Apps.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Graphics.Display;
using Windows.Phone.UI.Input;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkID=390556

namespace Reference.Apps
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class CodeView : Page
    {

        private NavigationHelper navigationHelper;

        public bool FullscreenCode { get; set; }

        public CodeView()
        {
            this.InitializeComponent();
            this.navigationHelper = new NavigationHelper(this, false);
            this.navigationHelper.LoadState += navigationHelper_LoadState;
            this.navigationHelper.SaveState += navigationHelper_SaveState;
            HardwareButtons.BackPressed += HardwareButtons_BackPressed;
            FullscreenCode = false;
        }

        void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e)
        {
            if (FullscreenCode)
            {
                VisualStateManager.GoToState(this, "Default", true);
                FullscreenCode = false;
                this.BottomAppBar.ClosedDisplayMode = AppBarClosedDisplayMode.Compact;
                ZoomButton.Icon = new SymbolIcon(Symbol.ZoomIn);
                e.Handled = true;
                return;
            }
            else
            {
                if (navigationHelper.CanGoBack())
                {
                    navigationHelper.GoBack();
                    e.Handled = true;
                }
            }
        }

        

        /// <summary>
        /// Populates the page with content passed during navigation. Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session. The state will be null the first time a page is visited.</param>
        private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
        }

        #region NavigationHelper registration

        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// 
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="GridCS.Common.NavigationHelper.LoadState"/>
        /// and <see cref="GridCS.Common.NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedTo(e);
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedFrom(e);
        }

        #endregion

        private void ZoomButton_Click(object sender, RoutedEventArgs e)
        {
            if (FullscreenCode)
            {
                VisualStateManager.GoToState(this, "Default", true);
                FullscreenCode = false;
                this.BottomAppBar.ClosedDisplayMode = AppBarClosedDisplayMode.Compact;
                ZoomButton.Icon = new SymbolIcon(Symbol.ZoomIn);
            }
            else
            {
                VisualStateManager.GoToState(this, "CodeFullscreen", true);
                this.BottomAppBar.ClosedDisplayMode = AppBarClosedDisplayMode.Minimal;
                ZoomButton.Icon = new SymbolIcon(Symbol.ZoomOut);
                FullscreenCode = true;
            }
        }


    }
}
